Desuperheater



1 Patented Jan. 6, 1931 nmrsof STATES PATENT ToFFIcE svE'Nn M. JoRGENsis'N, on ELIZABETH, NEW-JERSEY, Assienoitiro THE SUPERHEATER ooMrANY, or NEweYoRK, N- Y.,;- A CORPORATION or DELAWARE DESUPERHEATER Application filed June 18,

This invention relates to apparatus known as desuperheaters, of thetype employed in power plants where superheated steam is mainly used but wherein addition it isde- L; sired-for variouspurposes to have a supply body-f water, such passage of the steam low ering its temperature while simultaneouslyraising the temperature of' the water andtemperatu're to be causing steam of lower generated therefrom.

- This invention relates primarily to direct contact desuperheaters and has for its prin- {5g cipal object to improve such apparatus by providing means for producing an; effective circulationof the body'of water in which the steam coils'are submerged, Q v

Other objects are to provides; new and improved method of desuperheating steam which comprises, features of both direct and indirect contact desuperheating, and new and improvedapparatus for carrying out p v f 'erated from the water within the drum 10.

The steam rising from the water in the drum.

said method.

' The above and other-objects will appear more fully from the following more detailed description and by reference to the accompanying drawlngsformlng a part hereof and wherein Fig. 1 is'a side elevation partly in section of a satisfactory constructional example of a desuperheater'constructed in a'cv cordance with the principles of my invention. and Fig. 2is a section on the line 2- -2 of Fig. 1. p s

I have shown the invention as applied to an existing type of indirect contact desuperheater-which comprises a cylindrical drum or casing 1O, closed at the top, by a head 11 and having at the bottom thereof a header 12. A-tube sheet '13 separates the header 12 from the interior of the druiii;10.- The header 12 is providedwith a flanged inlet spud 14 i and a similar outlet spud 15. The spud 14 has connected to it a pipe or conduit 16 which I leads to the main boiler or other source of In the former, a jet, 1

supply 'ofsuperheated steam; a valve 17 is interposed between the conduit 16 and spud 14. Extending diametrically across the communication or flow of the fluid from the inlet tothe outlet of'the header. I

q A number of 'U-shaped tubes 19 have their ends secured in the tube sheet 13 andin communication with the interior of the header 12' upoiropposite sides of the bafile'18.

Vater introduced into theinterior of the drum 10 by means of a pipe 20 preferably located towards the lower end of said drum. lt will be understood that when the drum is filled to theproper level with water, preferably abovethe top end of the tubes lt), and "when superheated steam isfed to the desupe'rheater through the conduit 16, such superheatedsteam passing into the header 12 will rise through the left hand sides oft-he tubes 19 and will flow outwardly from the righthand. sides of said tubes upon the right hand side of the baffle 18 and will pass out of the header through the outlet spud 15. In its passage through the tubes, which are submerged in'water, the temperature of the superheated steam will be greatly reduced and steam of lowerteinperature will be gen 15 a conduit 23.: It will thus be seen that. the

steam generated from the water in the conheader 12 is a baffle 18 which shuts off direct taineris mixed or' blended with the steam that h'aspassed through the tubes 19 and it will be understood that this mixture of steam is led to. the place of us'e by the pipe or cond'ui't 23.

I The "constructional details so far described are those of an existing desujperheater of the indirect contacttype and such constructional:detailsform no part of the present invention eXceptinsofar-as they are illustrative of a satisfactory construction in which the principles of the present invention may be embodied;

In accordance with the present invention, a desuperheater of the type so far described, or any'othcr suitable constructioi'i, may be employed in conjunction with the features now to be described. In the indirect contact dcsuperheat'ers :a sheretofore constructed, all of the superheated steam is passedthrough tubes or coils such as the tubes 19 and out of direct contact with the water in which said tubes are submerged. In accordance with illustrative and not .as limiting the invention to the detailsof such means selected for illustration. As shown 1n the drawings a small zpipe 25 is connected with the conduit 16 for tapping a portion of the superheated steam anduleading it to the interior ofthe drum l0; thesteam' tapped through the pipe 25 being by-passed around the header 12 as clearly shown in Fig. 1 of the drawings.

he pipe 25 communicates at the drum end with a plurality of nozzles 26 eachof which ,nozzles project into a short tube 2'2. j;Each.-

tube 27 is connected by means of-an L 28 .with oneend of a curved pipe'29 the other end of which pipe is connected to the drum by ;a flanged fitting 30 and communicates "with the interior of the drum Any desired number of nozzles 26 and tubes 27 may be employed. For the purpose of the present dis closure I have shown twov of; such nozzles and tubes. 7 It will be understood that each tube is connected through a pipe 29to the interior ,of the drum The tubes 27 as shown in Fig. 2, terminate a short of the longitudinal center line, of the drum and rearwar dly of the-ends of a pair' of vertical baiiles31 which, as shown in Fi 2, extend substantially radially of the drum.- The inner ends of the baffles 3l-are spaced apart to .provideapassage for the steam inected through the nozzles 26, and the outer edges of the battles arespaced from the inner side walls of the drum.

header l2 and flows through the tubes 19 to- 'lhe operation ofthe apparatusas will be readily understoodis as follows: The major portion of the steam to be desuperheated passes through the conduit 16 to the I the outlet -15 fand'conduit23, ashereinbefore described.

The stean'i tapped through the pipe 25 is projected from the nozzles 26 into the tubes 27.- These, tubes however are in communication withthe interior of the drum through the pipes 29 and their connections. 1 The steam issuing from the nozzles produces iii an injectoneitect which causesithe water in the drum to be drawnthroughthe pipes 29:

and to be projected through the tubes 2 back into the interior of the drum. The injector effect causes a. jet of mingled. steam and water, or steam of reduced temperature, to be pro ected nto the nterior of the drum through the passageway or space formed between the inner ends of the battles 31. The eiiect of such jet is to produce a circulation of the water withinthe drum, said water passing about the outer ends of the baiiies 31 into the zone located between the battles and in which the tubes 27 are located.

It will be seen from the above that a very effective and relatively rapid circulation of the water contained in the drum is produced by the injectionof a i'ninor portion of the steam directly into the water and that altlioughfthis' part of the steam is diverted or taken from the main portion thereof, such diversion is not detrimental or objectionable but in factis ja'distinct advantage because of the more rapid heat transfer which occurs betweenthe steam and the water. intowhich said steam is directly injected than bet-ween the steam which passes throughthe coils out of direct contact j with the water.

It will'be understood that many changes, variations and modifications oi the constructional details of the apparatus selected for illustration may be made Without departing from the principles of the invention.

I claim s 1. The method of desuperheating'superheated. steam which consists in continuously passing aportion of the steam to be desuperheated in heat exchange relationship with a body of water but out of direct contact therewith, while simultaneously injecting another portion of said steam directly into said water and then mixing with the superheated steam the steam generated from said Water, by the heat imparted thereto by said superheated steam. I

2. The method. of desuperheating superheated steamwhich consists in continuously passing a major portion of such steam in heat exchange relationship with a body of water but out of direct contact therewith, while simultaneously injecting a minor portion of said steam directlyinto said water ant then mixing with thelsaid major portion of said steam the steam generated from said water. v

V 3. The method of desuperheatiug superheated steam which consists in continuously passing a major-portion oit' theisteam to he desuperheated in heat exchange relationship-with a body of water but out of direct contact therewith, while simultaneously injecting a minor portion of said steam directly into'said Water and employing the steamso i injected for producing acontinuous circulation of such water and then mixing with the stud ma or portionthe steam generated from said waters 4. In an apparatus of the character-described, a container adaptedto hold abody of water, a plurality of conduits in said con steam directly into said body of Water.

5. In a desupei 'heater, a drum adaptedto contain a body'of water, a plurality of con-.

duits located in said drum and submerged in said water, means for supplying water to said drum, said conduits being connected witha source of superheated steam, and a plurality ol nozzles also connectedwith said source'for injecting superheated steam directly into said water. i v

6. In a desuperheater, a drum adapted to contain a body of water, a pluralitygof 0011- duits located in said drum and submerged in said'water, means for supplying water to said drum, said conduitsbeing connected with a source of superheated steam, a plurality of nozzles also connected with saidsource for injecting superheated steam directly into said water, and baiiles located in said drum adjacent to said nozzles for causing thejets of steam projected from said nozzles to prov duce a circulation of the water within said drum;

7 Ina desu aerheater, a drum adapted to contain a body of water, a header located at one'end of said drum, said header being providedwith an inlet and an outlet, a conduit connecting said inlet with a source of superheated-steam, a baflie in said header for preventing direct communication between said inlet and outlet, a plurality of conduits having their ends in communication with said header upon opposite sides of said bafile, a plurality of nozzles projecting into said drum externally of said conduits, and a pipe for leading superheated steam from said inlet conduit to said nozzles. r I

8. In a desuperheater, a drum adapted to contain a body of water, a plurality of conduits submerged in said water, means for connecting said conduits with a source of superheated steam, a plurality oftubes pros jecting into said drum, each of said tubes having a jet nozzle therein, and means for connecting said nozzles with a source of su-' perheated steam.

L A desuperheater as set forth in claim 8 in which each of said tubes is open at its inner end to the interior of said drum and is connected at its outer end by a connecting pipe with a different point or zone of. the interior of the drum. i i

10. In a desuperheater, a drum adapted to contain a body of water, a plurality of conduits submerged in said water and through which superheated steam is adapted to be passed out of directcontactwith said Water, a plurality of open ended short tubes secured at spaced intervals to the side walls of said drum and projecting into the interior thereof, the inner ends of said tubes terminating short of the center of said drum, a nozzle pro-- jecting into the outer end of each of said 7 tubes andterminating short of the inner end thereof, and acirculating pipe for each of c said tubes,- ea'ch of'said pipes having its one end connected with the outer end of its respective tube and its other end leading to a different point on the side wall of said drum and communicating with the interior of the drum. i v

11. In a des uperheater, a drum adapted to contain a body of water, a plurality of conduits located in said drum and submerged in said waterfmeans for connecting said con duits with a source ofsuperh'eated steam, baffie means located in said drum adjacentto the centerthereof but out of contact'with the Y side Walls of said drum so as to permit circulationof water between said baflle means and the side Walls of the drum, and aplurality of nozzles connected with said source of i vsuperheated steam for projecting such steam into said water and for producing a circulation of the water about said baiile means.

In testimony whereof I have hereunto set in hand. y s SVENDM. JORGENSEN. 

